(networkflowmonitor): add support for Network Flow Monitor

[ashishbharadwajm]

Describe the feature

Amazon CloudWatch adds network performance monitoring for AWS workloads using flow monitors

1. https://aws.amazon.com/about-aws/whats-new/2024/12/amazon-cloudwatch-network-monitoring-workloads-monitors/
2. https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/CloudWatch-NetworkFlowMonitor.html

Use Case

Network Flow Monitor can be configured using L2 constructs allowing developers to better manage their resources

Proposed Solution

Add CDK support for networkflowmonitor

Other Information

No response

Acknowledgements

• I may be able to implement this feature request
• This feature might incur a breaking change

CDK version used

2.177.0

Environment details (OS name and version, etc.)

MacOS

[pahud]

Network Flow Monitor appears to be managed primarily through the Amazon CloudWatch console or CLI. I can't find any relevant document about its cloudformation support. If there's CFN support, CDK would have immediate L1 support and we can build L2s on top of L1s.